Valve details the achievements for The Passing

I'm really excited for The Passing, the new DLC for Left 4 Dead 2. Valve just put up the list of achievements you can get from the game and there are some spoilers in there. So, if you want to be surprised, don't check out the post. In any case, the list of some of the new features in the game seems interesting and I'm going to be sad to see one of the survivors biting it. I wouldn't be surprised if the dead survivor comes back later on as a boss character. Wouldn't that be something to see.